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1 | # Erebus IRC bot - Author: John Runyon | |
2 | # module loading/unloading/tracking code | |
3 | ||
4 | import sys, time | |
5 | import modlib | |
6 | ||
7 | modules = {} | |
8 | dependents = {} | |
9 | ||
10 | def isloaded(modname): return modname in modules | |
11 | def modhas(modname, attname): return getattr(modules[modname], attname, None) is not None | |
12 | ||
13 | def load(parent, modname, dependent=False): | |
14 | #wrapper to call _load and print return | |
15 | if dependent: | |
16 | print "Loading dependency %s..." % (modname), | |
17 | else: | |
18 | print "%05.3f [MOD] [#] Loading %s... " % (time.time() % 100000, modname), | |
19 | modstatus = _load(parent, modname, dependent) | |
20 | if not modstatus: | |
21 | print str(modstatus) | |
22 | elif modstatus == True: | |
23 | if dependent: | |
24 | print "OK. ", | |
25 | else: | |
26 | print "OK." | |
27 | else: | |
28 | print modstatus | |
29 | return modstatus | |
30 | ||
31 | def _load(parent, modname, dependent=False): | |
32 | if not isloaded(modname): | |
33 | sys.path.insert(0, 'modules') | |
34 | try: | |
35 | mod = __import__(modname) | |
36 | reload(mod) #in case it's been previously loaded. | |
37 | except BaseException as e: #we don't want even sys.exit() to crash us (in case of malicious module) so use BaseException | |
38 | return modlib.error(e) | |
39 | finally: | |
40 | del sys.path[0] #remove ./modules from path, in case there's a name conflict | |
41 | ||
42 | ||
43 | if not hasattr(mod, 'modinfo'): | |
44 | return modlib.error('no modinfo') | |
45 | ||
46 | if parent.APIVERSION not in mod.modinfo['compatible']: | |
47 | return modlib.error('API-incompatible') | |
48 | ||
49 | modules[modname] = mod | |
50 | dependents[modname] = [] | |
51 | ||
52 | for dep in mod.modinfo['depends']: | |
53 | if dep not in modules: | |
54 | depret = load(parent, dep, dependent=True) | |
55 | if not depret: | |
56 | return | |
57 | dependents[dep].append(modname) | |
58 | ||
59 | ||
60 | ret = mod.modstart(parent) | |
61 | if ret is not None and not ret: | |
62 | del modules[modname] | |
63 | del dependents[modname] | |
64 | for dep in mod.modinfo['depends']: | |
65 | dependents[dep].remove(modname) | |
66 | return ret | |
67 | else: #if not isloaded...else: | |
68 | return modlib.error('already loaded') | |
69 | ||
70 | def unload(parent, modname): | |
71 | if isloaded(modname): | |
72 | for dependent in dependents[modname]: | |
73 | unload(parent, dependent) | |
74 | for dep in dependents[modname]: | |
75 | dependents[dep].remove(modname) | |
76 | ret = modules[modname].modstop(parent) | |
77 | del modules[modname] | |
78 | return ret | |
79 | else: | |
80 | return modlib.error('already unloaded') | |
81 | ||
82 | def reloadmod(parent, modname): | |
83 | if isloaded(modname): | |
84 | if modhas(modname, 'modrestart'): modules[modname].modrestart(parent) | |
85 | else: modules[modname].modstop(parent) | |
86 | ||
87 | try: | |
88 | reload(modules[modname]) | |
89 | except BaseException as e: | |
90 | return modlib.error(e) | |
91 | ||
92 | if modhas(modname, 'modrestarted'): ret = modules[modname].modrestarted(parent) | |
93 | else: ret = modules[modname].modstart(parent) | |
94 | ||
95 | return ret | |
96 | else: | |
97 | return load(parent, modname) | |
98 | ||
99 | ||
100 | def loadall(parent, modlist): | |
101 | for m in modlist: load(parent, m) | |
102 | def unloadall(parent, modlist): | |
103 | for m in modlist: unload(parent, m) | |
104 | def reloadall(parent, modlist): | |
105 | for m in modlist: reloadmod(parent, m) | |
106 | ||
107 | sys.path.append('modules') |